PHOTOS: Britney Spears Goes Back to the Dark Side

As they say, idle hands are the devil's playthings... Maybe that explains why Britney Spears changes her hair color every time she goes two weeks without anything to keep her busy. Yesterday, the pop superstar, who had recently re-blonded after dying her hair darker in the summer, showed off some seriously dark tresses while popping into the Mondrian Hotel in West Hollywood. What do you think of Brit-Brit's brown locks?